{"as_of":"2026-10-23","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":43,"name":"Schleicher ASK-21","note":"","unit":"registered","url":"https://eflight.com/models/schleicher/ask-21"},{"count":506,"name":"Schleicher","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/schleicher"},{"count":null,"name":"Built of composite","note":"as the model family is built; the register does not record it per aircraft","unit":"","url":"https://eflight.com/materials/composite"}],"relation":"is a"},{"group":"Owner","items":[{"count":1,"name":"Windy City Soaring Association INC","note":"","unit":"aircraft registered to this organisation","url":"https://eflight.com/search?q=Windy City Soaring Association INC"}],"relation":"owned by"},{"group":"Place","items":[{"count":15,"name":"Hinckley, IL","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"Hinckley Airport","note":"0C2","unit":"","url":"https://eflight.com/airports/0C2"},{"count":8050,"name":"Illinois","note":"","unit":"aircraft registered","url":"https://eflight.com/states/IL"}],"relation":"registered in"},{"group":"Record","items":[{"count":null,"name":"No NTSB accident or incident record under this tail number","note":"","unit":"","url":"https://eflight.com/aircraft/N121WC#records-check"}],"relation":"involved in"},{"group":"Analytics","items":[{"count":null,"name":"Accident history of the Schleicher ASK-21","note":"","unit":"","url":"https://eflight.com/models/schleicher/ask-21#accidents"},{"count":null,"name":"Accidents by model, with rates per thousand registered","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"compared in"},{"group":"Live","items":[{"count":null,"name":"Where N121WC is now","note":"","unit":"","url":"https://eflight.com/live?q=N121WC"}],"relation":"seen at"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"built_of":{"inherited_from_model":true,"material":"composite","name":"composite","note":"A glass-fibre glider."},"id":"N121WC","maker":"Schleicher","model":"ASK-21","name":"Schleicher ASK-21 N121WC","state":"IL","type":"aircraft","url":"https://eflight.com/aircraft/N121WC","year_built":1990},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}